<ul id="nav">
  <li class="first"><a href="#">電報完全手冊</a></li>
  <%= menu_line_item '萬元有找', {:controller => :show, :action => :lower_than_low} %>
  <%= menu_line_item '入門', {:controller => :show, :action => :between_low_and_medium} %>
  <%= menu_line_item '中階', {:controller => :show, :action => :between_medium_and_advanced} %>
  <%= menu_line_item '高階', {:controller => :show, :action => :higher_than_advanced} %>
  <li class="last"><a href="#">關於本站</a></li>
</ul>